[SPOILERS] Apparent problems with the Silent King

This is my first time replaying PST in years, and I apparently ran into an issue with the Silent King.

Apparently, if you complete both quests to get you released in the Dead Nations (killing the cranium rats and exposing Soego) and ask Hargrimm to speak to the Silent King, he will simply allow you to leave. However, if you activated the direct portal to the Silent King and go in afterwards, it will simply be an empty throne room, and neither Hargrimm or Stale Mary will appear. As such I cannot complete the quest for Many as One without forcing my way in.